# Number::Range::Regex::Util
#
# Copyright 2012 Brian Szymanski. All rights reserved. This module is
# free software; you can redistribute it and/or modify it under the same
# terms as Perl itself.
package Number::Range::Regex::Util;
use strict;
use vars qw ( @ISA @EXPORT @EXPORT_OK $VERSION );
eval { require warnings; }; #it's ok if we can't load warnings
require Exporter;
use base 'Exporter';
@ISA = qw( Exporter );
@EXPORT = @EXPORT_OK = qw ( most min max multi_union
option_mangler has_regex_overloading );
$VERSION = '0.13';
require overload;
sub has_regex_overloading {
# http://www.gossamer-threads.com/lists/perl/porters/244314
# http://search.cpan.org/~jesse/perl-5.12.0/pod/perl5120delta.pod#qr_overload$
# 1.08, 1.09 are too low. 1.10: works
# http://search.cpan.org/~jesse/perl-5.11.1/lib/overload.pm
return defined $overload::VERSION && $overload::VERSION > '1.09';
}
sub min { return most( sub { $_[0] < $_[1] }, @_ ); }
sub max { return most( sub { $_[0] > $_[1] }, @_ ); }
sub most {
my ($condition, $first, @rest) = @_;
my $most = $first;
foreach my $o (@rest) {
$most = $o if $condition->($o, $most);
}
return $most;
}
sub multi_union {
my @ranges = @_;
my $self = shift @ranges;
$self = $self->union( $_ ) for @ranges;
return $self;
}
sub option_mangler {
my ($passed_opts) = @_;
# local options can override defaults
my $opts;
if($passed_opts) {
die "too many arguments" unless ref $passed_opts eq 'HASH';
# make a copy of options hashref, add overrides
$opts = { %{$Number::Range::Regex::Range::default_opts} };
while (my ($key, $val) = each %$passed_opts) {
$opts->{$key} = $val;
}
} else {
$opts = $Number::Range::Regex::Range::default_opts;
}
return $opts;
}
1;